This cascade circuit was obtained from old Signetics documentation. The circuit makes use of special neon lamps that act as valves. Observe the high supply voltage.
This basic oscillator with tunnel diode generates a 100 kHz signal with 1 uW output power. The...
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...
This circuit was found in a 1980s documentation for amateur radio. The circuit is for 9 MHz...